80 MODERN SYSTEM. 



vtcn much narrower than the shell, on every side imbricated with 

 membrai-aceous, foliaceous lamella", which surrramd or embrace 

 it: two of the lam clke are dorsal, the one being placed over the 

 other; the other lamella- are placed on the sides of the belly, three 

 on each side ; apex of the abdomen terminated by two very long iila- 

 ments, and with two shorter filaments below them : rostrum elongato- 

 cylindric, inserted behind the anterior legs, furnished at its extremity 

 with two straight corneous mandibles: legs six; anterior pair three- 

 jointed, the second joint near the apex above unidentate, the last ter- 

 minated by a claw; second pair triarticulated, the last joint ovate, 

 compressed; third pair biarticulate, the second joint very thick, in- 

 ternally dentated, armed at its extremity by a strong claw. 

 Sp. 1. Anth. Smithii. Leach, Encycl. Brit. Supp. vol. 1. PL 20. 



This species was discovered sticking to a shark which was thrown 

 ashore on the coast of Exmouth, in Devon, by T. Smith, esq. 



Division II. — Bodi/ covered ly a bivalve sliell: eyes seasilr. 

 Subdivision l.^-Hend porrected. 

 Genus 5. DAPIINIA, Mull., Latr., Base, Leach. 

 F.i/e one only : antenna two, branching. 

 Sp. 1. Daph. Pulex. Tail indexed: shell mucronate behind. 

 Monoculus Pulex. Linne, Fair. 

 Inhabits ponds and marshes. 



Subdivision 2. — Head concealed. 

 Genus 6. CYPPJS, Midi., Latr., Bosc, Leach. 

 Antenna: terminated by a brush. 



The animals of this genus inhabit pools and ditches containing 

 pure ^vater ; they swim with very great rapidity, and whilst in mo- 

 tion conceal their whole body within their shell, which is truly bi- 

 valve. 

 Sp. 1. Ct/p.conchacea. Shell ovate, tomentose. 

 Monoculus conchaceus. Linn., Fair. Cypris pubera. Mull. Cypris 



conchacca, Latr., Leach. 

 Inhabits France, Germany, and England. 



Genus 7. CYTHERE, MiilL, Latr., Bosc, Leach. 

 Antennic simply pilose. 



This genus was first discovered and established by Miiller, wlio 

 first observed all the species described in his Fntomostraca. It is di- 

 stinguished from Cypris by the antenna-, which are not terminated by 

 a pencil of hairs. The legs are eight in number, and are rarely drawn 

 within the shell, which is really bivalve. 



The Cytlteres have no tail, and their antennae, like those of the ('(/- 

 prw/c";, have their articulations pilose. They have but one eye. Ail 

 the species inhabit ihe sea, and may be found aiTiong the conferva 



